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Desorption of stearic acid upon surfactant adsorbed montmorillonite : a thermogravimetric study

Lu, Longfei, Cai, Jingong, & Frost, Ray L. (2010) Desorption of stearic acid upon surfactant adsorbed montmorillonite : a thermogravimetric study. Journal of Thermal Analysis and Calorimetry, 100(1), pp. 141-144.

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Abstract

Thermal analysis and differential thermal analysis offers a means of studying the desorption of acids such as stearic acid from clay surfaces. Both adsorption and chemisorption can be distinguished through the differences in the temperature of the mass losses. Increased adsorption is achievable by adsorbing onto a surfactant adsorbed montmorillonite. Stearic acid sublimes at 179 °C but when adsorbed upon montmorillonite sublimes at 207 and 248 °C. These mass loss steps are ascribed to the desorption of the stearic acid on the external surfaces of the organoclays and from the de-chemisorption from the surfactant held in the interlayer of the montmorillonite.

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9 citations in Web of Science®

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ID Code: 31835
Item Type: Journal Article
Additional URLs:
Keywords: thermogravimetric analysis, differential thermogravimetric analysis, chemisorption, montmorillonite, desorption, stearic acid.
DOI: 10.1007/s10973-009-0169-2
ISSN: 1388-6150
Subjects: Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000) > PHYSICAL CHEMISTRY (INCL. STRUCTURAL) (030600) > Colloid and Surface Chemistry (030603)
Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000) > PHYSICAL CHEMISTRY (INCL. STRUCTURAL) (030600)
Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000) > PHYSICAL CHEMISTRY (INCL. STRUCTURAL) (030600) > Structural Chemistry and Spectroscopy (030606)
Divisions: Past > Schools > Chemistry
Past > QUT Faculties & Divisions > Faculty of Science and Technology
Copyright Owner: Copyright 2010 Akadémiai Kiadó.
Copyright Statement: The original publication is available at SpringerLink http://www.springerlink.com
Deposited On: 20 Apr 2010 11:22
Last Modified: 01 Mar 2012 00:07

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